RSS and Wordpress

Without giving too much away about my new site just yet lol, I have a query.

Basically I'm probably going to run it on wordpress and I've found an RSS feed that the visitors of the site will find useful, I'm allowed to show the contents of the feed as long as I dont edit it.

What software/plugin do I use to do this? I've looked at simplepie but I'm not even sure if that's meant for what I want.

Basically I just want the stuff from this RSS feed to display on my site together with the stuff I'll be posting myself.